code: def import_try_install(package, extern_url=None):
      """Try import the specified package.
      If the package not installed, try use pip to install and import if success.
  
      Parameters
      ----------
      package : str
          The name of the package trying to import.
      extern_url : str or None, optional
          The external url if package is not hosted on PyPI.
          For example, you can install a package using:
           "pip install git+http://github.com/user/repo/tarball/master/egginfo=xxx".
          In this case, you can pass the url to the extern_url.
  
      Returns
      -------
      <class 'Module'>
          The imported python module.
  
      """
      try:
          return __import__(package)
      except ImportError:
          try:
              from pip import main as pipmain
          except ImportError:
              from pip._internal import main as pipmain
  
          # trying to install package
          url = package if extern_url is None else extern_url
          pipmain(
              ["install", "--user", url]
          )  # will raise SystemExit Error if fails
  
          # trying to load again
          try:
              return __import__(package)
          except ImportError:
              import sys
              import site
  
              user_site = site.getusersitepackages()
              if user_site not in sys.path:
                  sys.path.append(user_site)
              return __import__(package)
      return __import__(package)
  
file_path: insightface/python-package/insightface/utils/filesystem.py
imports: import os
  import os.path
  import errno
label_desc: Use image node_id 7 for calling a global function with example usage: import_try_install(package, extern_url) and returns: __import__, __import__, __import__, __import__